Crozing machine



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CROZING MACHINE Original Filed Aug. 15, 1936 3 Sheets-Sheet 3 W ala af IWWW Patented June 20, 1939 PATENT OFFICE CROZING MACHINE Teaphel A.McMahon,

William Hierholzer, and

William Glazat, Grand Haven, Mich.

Original application August 15, 1936, Serial No.

96,296. Divided and this application September 22, 1937, Serial No.165,176

1 Claim.

This application is a division of application Ser. No. 96,296 filed byus August 15, 1936, for a Barrel making machine, and is filed in com--pliance with the Ofiices requirement for division dated October 14,1936.

The invention pertains to the coopering art, and particularly to barrelmaking.

In this specification we have used the term barrel in its mostcomprehensive orgeneral sense, intending to include thereunder, kegs,buckets, kits, firkins and all other hollow receptacles made of stavesin which the closure members or heads of the ends are held in place bybeing seated in a croze.

A croze is the continuous notch or groove near the ends of the inside ofthe staves of which a barrel is composed and in which the head of thebarrel is seated and held.

The principal object of the invention is to provide an independentlydriven croze cutting tool which may be moved into and out of operatingposition without interfering with any of the other operations of abarrel making machine.

Another object is to so mount the device that the cutting tool may beadjusted to cut any desired number of crozes of precisely the same depthand circumference so that any one of a plurality of previously preparedidentical heads will fit, interchangeably, in any of the crozes withoutspecial individual fitting.

Another object is to provide a croze cutting tool that will make aperfect finished croze and chine by a single revolution of the toolabout the inside of a barrel.

Another object is to provide a croze cutting device in which the tool,invariably, travels in a perfect circle.

Another object is to provide a croze cutter in which the circle traveledby the cutting tool may be varied in diameter by adjustment withinreasonable limits.

Another object is to provide a croze cutting machine in which thecarrier of the cutting tool maybe removed so that it may be replaced byother tool carrying elements which carry the cutting tool in circleswhich are greater or less in size than the capacity of the standardmachine.

Other objects will appear as the description of the machine proceeds.

To illustrate the best method to practice the invention now known to uswe have filed as a part of this specification three sheets of drawingsin which the same figures of reference, wherever used, indicate the sameelements, and in which Figure 1 is a diagrammatic view in elevation ofour crozing device and the related co-operating parts of the Barrelmaking machine which is the subject of the parent application, 96,296,August 15, 1936, of which this is a division.

Fig. 2 is an elevational view of a part of the carrying plate with thecrozing device mounted thereon.

Fig. 3 is a plan view of the parts shown in Fig. 2, but drawn upon alarger scale.

Fig. 4 is a View similar to the view in Fig. 2, but drawn on a largerscale and showing some parts in section.

Fig. 5 is a detail showing a perspective view of the adjustable barrelcentering and clamping ele-, ments. v

Fig. 6 is an elevational View of the invention as developedindependently of the barrel making machine.

Fig. '7 is a detail of the right hand end of the carrying plate ofFigure 6.

Fixed in an upright position and properly spaced are a pillar 20 and apedestal 36.

Pillar 20 is preferably hollow to serve as a housing for a counterbalance i2. This counter balance should be just sufficient to hold acarrying plate and its related parts in any position to which it islifted or lowered.

Pillar 20 and pedestal 30 may be portions of our barrel making machineSer. No. 96,296, filed August 15, 1936, as shown in Figure 1 or they maybe parts of an independent crozing machine as illustrated in Figure 6. v

Swingably and slidably mounted upon pillar 20 is a carrying plate llhaving fastened thereto or integral therewith a collar I6 surroundingpillar 20. The operating parts of our crozing machine are mounted uponcarrying plate H. When carrying plate ii is a part of our barrel makingmachine it is. V-shape and one arm of the plate carries the crozingelements and the other arm of the V-shape carrying plate carries abarrel head locating device as fully explained in our barrel makingmachine application 96,296, August 15, 1936.

Carrying plate H extends from pillar 26 to pedestal 36 and it has anotch 2| (see Fig. 7) in its swinging end into which a swinging lockinglatch 22 takes to hold the carrying plate rigidly fixed during the crozecutting operation.

Mounted upon carrying plate I I is a removable undercut circular bearingring 8 and rotatably mounted in the undercut part of bearing ring 8 isan annular member 1.

Circular bearing ring 8 and annular member 1 may be provided withanti-friction bearing elements if desired. We have not found itnecessary to employ such anti-friction devices because if the parts arewell lubricated annular member 1 turns with sufiicient freedom inbearing ring 8.

Fixed to annular member 1 at diametrically opposite points is amotor-carrying cross-bar 3 upon which is adjustably located bracket 5having bearings in which the rotatable shaft 3 of an electrically drivenmotor 4 is located.

Motor 4 is operated by current conveyed to it from a suitable source ofelectricity by loosely hanging conductors 4', so that it may be re--volved with annular member I as the croze cutting tool is carried aroundthe inside of a barrel.

Removably mounted upon the shaft 3 is a cutter 2 of the desired shape tomake the croze and to simultaneously form the chine of the barrel.

Carrying plate H and. the crozing machine mounted thereon are accuratelycounter-balanced by a weight l2, housed inside ofpillar 26. A cable [3is attached to weight I2 and extends upwardlyand near the top of pillar20 it passes over a pulley i5 and then downwardly where its other end isfixed to 2. lug I4 provided for that purpose on collar It. To getsatisfactory results it is necessary that the barrel be held rigidly andunyieldingly while the cutter is revolved around the inside of thebarrel during the cutting of the croze. If it is not held in a fixedposition the croze will vary in depth and, because the barrel givesunequally under the pressure of the cut-- ting element, the croze willnot be perfectly circular and the fit of the head in the croze will notbe liquid tight.

When the invention is developed as an integral part of our barrel makingmachine the stave bending dies perform the function of barrel hold ingclamps (Fig. 1), as fully describedin our parent application Ser. No.96,296, August 1936; but when the invention is developedin dependentlyof the barrel making machine (Fig. 6), adjustable centering and clampingelements l9 are provided on the under side of carrying plate I I(Figures 3, 4, 5 and 6) which are brought down from above and engage theupper end of the barrel being operated upon with a sort of camming orwedging action and hold it unyieldingly in a fixed position during thecutting of 7 the croze.

sary to have a number suflicient to hold the barrel unyieldingly in alldirections during the cutting of the croze. It will be obvious thatcrozes of the exact depth and circumferencedesired will not be producedunless the barrel is held'in a fixed unyielding position during theentire revolution of the cutting tool around the inside of the barrel.

As shown in Figures 3 and 4 the motor with its cutter carrying shaft ismounted upon an adjustable slide 5' on bracket 5 in order thatadjustments of extreme exactness may be made by the manipulation of theset screws l6 and II.

The operation is as follows:

A sufiicient number of staves to form the wall of a barrel are properlyplaced in our barrel making machine, Ser. No. 96,296, August 15, 1936;the stave bending dies are operated and the staves are forced intoproper shape and position; while held in that position by the stavebending dies carrying plate II is lifted suflicient- 1y for cutter 2 tobe swung over the top end of the barrel and be lowered inside thebarrel. Carrying plate II is locked to pedestal 30 with cutter 2 insidethe barrel by swinging latch 22. Motor 4 is then started and cutter 2 isadjusted by set screws l6 and H until the proper depth of croze is cut.The operator then grasps handle l8 and causes cutting tool 2 to make onecomplete revolution inside the barrel which completes the croze and theshaping of the chine.

When the independent crozing' machine of Figures 3, 4, 5 and 6 isemployed the barrel is shaped in our barrel-making machine by the stavebending dies or it may be shaped by any other barrel forming device andheld in proper shape by trussing hoops or other means. The barrel isthen placed centrally between pillar and pedestal 3a of the machineshown in Fig. 6. Carrying plate H is lifted high enough for cutter 2 toclear the upper edge of the barrel and swung latterly so cutter 2 may belowered inside the barrel. As carrying plate II is lowered cen- 'teringclamps l9 engage the outer side of the barrel and hold it rigidly whenswinging latch 22 on pedestal 3B is engaged in notch 2| in the end ofcarrying plate II which looks the crozingmachine immovably with thebarrel properly positioned by the clamps l9. Motor 4 is started whichrotates cutter 2 at high speed; while the operator having grasped handlel8 causes the annular member 1 which carries the cutting tool to make asingle rotation which causes cutter 2 to make a complete revolution inan exact circle inside of the barrel completing the formation 3f thecroze and finishing the chine.

The barrel is then released and removed, another barrel put in properposition and the operation repeated.

Having thus described our invention and explained the construction andmode of using our machine we desire to secure Letters Patent of theUnited States to protect us in the exclusive use of the following claim.

We claim:

In a crozing machine the combination of an upstanding pillar, anupstanding pedestal, a carrying plate rotatably and slidably mountedupon the pillar, a bearing ring mounted upon the carrying plate, anannular member rotatably mounted in the bearing ring, a motor carryingbracket on the annular member, amotor having a projecting shaft mountedon the bracket, a croze cutting tool on the motor shaft,'barrel clampingmembers on the carrying plate, means for clamping the freeend of thecarrying plate to the pedestal, means for revolving the rotating cutterabout the inside of a barrel and means for conducting operating currentto the motor.

TEAPHEL A. McMAI-ION. WILLIAM HIERI-IOLZER. WILLIAM GLAZAT.

